20115472

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{997}}^1$

素因数の和:1115

約数の個数: 40

約数和(自身を含む): 42446936

約数和(自身を除く): 22331464

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 97, 104, 194, 208, 388, 776, 997, 1261, 1552, 1994, 2522, 3988, 5044, 7976, 10088, 12961, 15952, 20176, 25922, 51844, 96709, 103688, 193418, 207376, 386836, 773672, 1257217, 1547344, 2514434, 5028868, 10057736, 20115472]

約数ペア:

[(1, 20115472), (2, 10057736), (4, 5028868), (8, 2514434), (13, 1547344), (16, 1257217), (26, 773672), (52, 386836), (97, 207376), (104, 193418), (194, 103688), (208, 96709), (388, 51844), (776, 25922), (997, 20176), (1261, 15952), (1552, 12961), (1994, 10088), (2522, 7976), (3988, 5044)]